Regular Expressions 101

1st Alternative(^(DHL)((?!@dhl\.com).)*$)

Group 1(^(DHL)((?!@dhl\.com).)*$)

^start of line

Group 2(DHL)

DHLthe literal text DHL (case sensitive)

Group 3((?!@dhl\.com).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!@dhl\.com)

@dhlthe literal text @dhl (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

.any character (except for line terminators)

$end of line

2nd Alternative(^(SF\sEXPRESS)((?!@sf-express\.com).)*$)

Group 4(^(SF\sEXPRESS)((?!@sf-express\.com).)*$)

^start of line

Group 5(SF\sEXPRESS)

SFthe literal text SF (case sensitive)

\sany whitespace character

EXPRESSthe literal text EXPRESS (case sensitive)

Group 6((?!@sf-express\.com).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!@sf-express\.com)

@sf-expressthe literal text @sf-express (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

.any character (except for line terminators)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(^(DHL)((?!@dhl\.com).)*$)|(^(SF\sEXPRESS)((?!@sf-express\.com).)*$)

New

DHL EXPRESS <notice@otherdomain.com>
DHL EXPRESS <notice@dhl.com>

SF EXPRESS <notice@spamdomain.com>
SF EXPRESS <notice@sf-express.com>

Any Email Address <any@emailaddress.com>